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/*
* drivers/video/tegra/host/gk20a/clk_gk20a.h
*
* GK20A Graphics
*
* Copyright (c) 2011 - 2014, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _NVHOST_CLK_GK20A_H_
#define _NVHOST_CLK_GK20A_H_
#include <linux/mutex.h>
#define GPUFREQ_TABLE_END ~(u32)1
enum {
/* only one PLL for gk20a */
GK20A_GPC_PLL = 0,
};
struct pll {
u32 id;
u32 clk_in; /* KHz */
u32 M;
u32 N;
u32 PL;
u32 freq; /* KHz */
bool enabled;
};
struct pll_parms {
u32 min_freq, max_freq; /* KHz */
u32 min_vco, max_vco; /* KHz */
u32 min_u, max_u; /* KHz */
u32 min_M, max_M;
u32 min_N, max_N;
u32 min_PL, max_PL;
};
struct clk_gk20a {
struct gk20a *g;
struct clk *tegra_clk;
struct pll gpc_pll;
u32 pll_delay; /* default PLL settle time */
struct mutex clk_mutex;
bool sw_ready;
bool clk_hw_on;
bool debugfs_set;
};
/* APIs used for separate HAL */
struct clk *gk20a_clk_get(struct gk20a *g);
/* APIs used for both GK20A and GM20B */
unsigned long gk20a_clk_get_rate(struct gk20a *g);
int gk20a_clk_set_rate(struct gk20a *g, unsigned long rate);
long gk20a_clk_round_rate(struct gk20a *g, unsigned long rate);
#define KHZ 1000
#define MHZ 1000000
static inline unsigned long rate_gpc2clk_to_gpu(unsigned long rate)
{
/* convert the kHz gpc2clk frequency to Hz gpcpll frequency */
return (rate * KHZ) / 2;
}
static inline unsigned long rate_gpu_to_gpc2clk(unsigned long rate)
{
/* convert the Hz gpcpll frequency to kHz gpc2clk frequency */
return (rate * 2) / KHZ;
}
#endif /* _NVHOST_CLK_GK20A_H_ */
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